Convergence in the incompressible limit of new discontinuous Galerkin methods with general quadrilateral and hexahedral elements
Convergence in the incompressible limit of new discontinuous Galerkin methods with general quadrilateral and hexahedral elements
复制标题
一般四边形和六面体单元的新间断伽辽金方法不可压缩极限的收敛性
DOI:
10.1016/j.cma.2020.113233
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发表时间:
2020
影响因子:
7.2
通讯作者:
Grieshaber B
中科院分区:
文献类型:
--
作者:
Grieshaber B
Standard low-order finite elements, which perform well for problems involving compressible elastic materials, are known to under-perform when nearly incompressible materials are involved, commonly exhibiting the locking phenomenon. Interior penalty (IP) discontinuous Galerkin methods have been shown to circumvent locking when simplicial elements are used. The same IP methods, however, result in locking on meshes of quadrilaterals. The authors have shown in earlier work that under-integration of specified terms in the IP formulation eliminates the locking problem for rectangular elements. Here it is demonstrated through an extensive numerical investigation that the effect of using under-integration carries over successfully to meshes of more general quadrilateral elements, as would likely be used in practical applications, and results in accurate displacement approximations. Uniform convergence with respect to the compressibility parameter is shown numerically. Additionally, a stress approximation obtained here by postprocessing shows good convergence in the incompressible limit.
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影响因子:
4.1
作者:
B. Reddy;D. van Huyssteen
通讯作者:
D. van Huyssteen
DOI:
10.3929/ethz-a-004401327
发表时间:
2002
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
T. Wihler
通讯作者:
T. Wihler
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
B. Rivière;M. Wheeler
通讯作者:
M. Wheeler
影响因子:
1.7
作者:
Carstensen, C;Bartels, S;Klose, R
通讯作者:
Klose, R
DOI:
10.1016/j.camwa.2019.04.016
发表时间:
2018
期刊:
Comput. Math. Appl.
影响因子:
--
作者:
B. J. Grieshaber;F. Rasolofoson;B. Reddy
通讯作者:
B. Reddy